Casting-machine.



J. S. BANCROFT & M. C. INDAHL.

CASTING MACHINE.

APPLICATlON FILED AUG-l3. 1915.

1,220,057. Patented Mar. 20, 1917.

5 smears-suit 1.

awwwwbws m Qttomw;

R J J. Bazzcrqf'i,

1; s. BANCROFT & M. c. INDAHL.

CASTING MACHINE.

APPLICATION .HLED AUG. [3. 1915- I 1,220,057, Patented Mar. 20, 1917.

5 SHEETS-SHEET 2- SMMM;

w emu/nu s r us co.. DNOTO-LITHO vusnuvarou. o. a,

J. S. BANCROFT & M. C. INDAHL.

CASTING MACHINE. APPLICATION FILED AUG. 13. 1915.

1 ,220,057. Patented Mar. 20, 1917.;

5 SHEETS-SHEET 3.

30 3g L AIR SUP/ 1. r

4] & I 4 Suva M301 wanna/5 M 3 45 7- SuBtZJZCI'O fb $5., 44 M. c. 176%.07% (2M r M J. S. BANCROFT & M. C. INDAHL.

CASTING MACHINE. APPLICATION men AUG. 12.1915.

1,220,057. Patented Mar. 20, 1917.

5 SHEETS-SHEET 4- Elwueutoz;

L'S. BANCROFT & M- C. INDAHL.

CASTING MACHINE.

APPLICATION FILED AUG. 13. 1915..

T io. P 9

wweMom;

M w a J a wumm zrzns ca. nwmnmz. wasumc mu. 0. c,

UNETED STATES PATENT OFFICE.

JOHN SELLERS BANCROFT AND MAURITZ C. INDAHL, F PHILADELPEIA, PENNSYL-VANIA, ASSIGNOES TO LANSTON MONGTYBE MACE-ZINE COMPANY, 0F PHILADEL-PHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

CASTING-MACHINE.

To all whom it may concern:

Be it known that we, JOHN SELLERS BAN- onorr and MAUmTz C. INDAHL,citizens of i the United States, residing at Philadelphia,

in the county of Philadelphia and State of Pennsylvania, have inventedcertain new and useful Improvements in Casting Machines; and we dohereby declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, formingpart of this specification, and to the figures and letters of referencemarked thereon.

This invention relates to casting machines and more especially tomachines for casting type in accordance with the now well understoodLanston monotype system, the objects of the invention being to provide ameans whereby the matrix case and matrix therein which has been broughtto posit-ion over the mold will be guarded or protected against anypossible accidental disturbing influence, due to the continued or falsemovements of the positioning mechanism or any movements thereofsubsequent to the time when the matrix has been brought into positionand prior to the time when the matrix is locked inposition for thecasting operation. By so guarding the matrix against any disturbinginfluence, its cooperation with the centering-pin is made more certain,the life of the parts is prolonged bythe elimination of the possibilityof the centering pin failing to cooperate with the matrix in the mannerdesigned, and it becomes possible to distribute the movements of thepositioning mechanism more evenly,throughout a working cycle, therebycontributing to the speed and ease with which the automatic functions ofthe machine may be performed.

In carrying the invention into practice, a. guard or protecting memberis provided which is adapted to be primarily positioned in unison withthe positioning of the matrix, and, when positioned, is locked andadjusted to form astop or abutment which will prevent the reengagementof the positioning mechanism or aws with the matrix and the latter aretherefore free for continuing or subsequent movements, and by nopossibility can any vibration or false movement of the positioningmechanism affect the matrix itself during the interval between the timeSpecification of Letters Patent. Patgnted 20 1917 Application filedAugust 13, 1915.

Serial No. 45,420.

when it is positioned and the time when the parts are locked up for thecasting operation. e

. Referring to the accompanying draw- 1ngs,'-

Figure 1 is a. top plan view of so, much of a Lanston monotype castingmachine as is deemed necessary for a complete understanding of thepresent invention, many of the parts, however, being omitted in orderthat the mechanism relatingto the present invention may not be obscured.

Fig. 2 is a perspective View of the guard devices with their operatingmechanisms, detached from the machine.

Fig. 3 is an elevation of the mechanism shown in Fig. 2, the point ofview being from the right hand side of Fig. 1.

Fig. 4 is an elevation looking at one of the guard operating mechanismsfrom a point of View indicated by the arrow 4 in Fig. 3, with the motorcylinder in section.

Fig. 5 is a sectional plan view of one of the guard devices with itsguiding and locking mechanisms.

Fig. 6 is a perspective view showing the under and upper faces of theturntable plates at the left hand side of Fig. 1 on which the pawls aremounted for locking the guard.

Fig. 7 is a perspective view of oneof the guard supports and guides.

Fig. 8 is a vertical section substantially on the line 88 of Fig. 3.

Figs. 9 and 10 are vertical sections through the valve mechanism shownin Fig. 8, taken in planes to show the ports and passages leading fromthe valve to the motor cylinders of the guards.

Like reference characters .in the several figures indicate the sameparts.

The mechanism of the Lanston monotype casting machine for moving thematrices into position over the mold under the control of signal setdevices is now well understood and a particular description of the samefor a full'understanding of the present nvention 1S not necessaryherein, especially as it is fully set forth in the patent heretoforegranted to J. S. Bancroft, No. 625,998, dated May 30, 1899, and to whichreference may be had for an understanding of those parts of the machinenot herein illustrated. In Fig. 1 of the accompanying drawings the tongj aw bell crank indicated at 1, the pin jaw tongs at 2, the matrix jawtongs at 3, the pin jaws at at, the matrix jaws at 5, and some of thesignal set pins at 6, said pins, of course, serving to determine thepoints at which the pin jaws a will close. The mold is indicated at 7and the matrices and matrix case in dotted lines at S. The sliding framein which the matrix case is mounted is indicated at 9, said frame beingguided and controlled by the cross slide 10 and the latter is positionedby the cross slide draw rod 11, having a head 1 located between the rearmatrix jaws 5. The matrix case is likewise connected with a draw rod 13having a head 14: located between the front matrix jaws 5.

In operation the pin jaws in closing upon the signal set pins set stopracks 15 and the latter control the position at which the matrix jawsshall close. The pin tongs and matrix tongs operate simultaneously inopposite directions whereby, during the return of t 1e pin tongs andjaws to their outer position, the matrix tongs and jaws close forpositioning the matrix, and vice versa. The parts are given motion andconnected for simultaneous operation through well known connectionswhich it is unnecessary to describe herein, inasmuch as they form nopart of the present invention.

The matrix jaws 5, having positioned the matrix over the mold, should beimmediately freed from th matrix and the latter is thereafter accuratelycentered and locked in position by the usual vertically movablecentering pin. During the interval between the positioning of the matrixover the mold and setting of the centering pin and locking of the partsfor the casting operation there is liability of the matrix jawsdisturbing the position of the matrix, this liability being accentuatedwhen the matrix is positioned with one or the other of the jaws inproximity to the extremity of its outward movement, and in order toovercome this difficulty the present invention provides a means in theform of a guard mechanism which is primarily positioned by the matrixjaws simultaneously with the positioning of the matrix itself, and whichguard mechanism is locked when the matrix is positioned and caused tospread, as it were, to form an abutment between the mat ix "aws whichwill thereafter prevent the re'e'ngagement of the jaws with the matrixso that the latter cannot be accidentally disturbed by movements of thematrix jaws.

Inasmuch as there are two pairs of matrix jaws a guard mechanism isprovided for each and a detail description of one will answer for'both.This guard mechanism embodies primarily a head or projection 16preferably made in two parts 16 and 16, respectively, adapted to projectbetween the matrix jaws 5. Said heads or projections are mounted onslides 17 and 17, adapted to move in guideways formed in guard carriers18 in the form of brackets rigidly but adjustably mounted on the mainframe of the machine as at 19. The slides 17 and 17 a work through thecarriers 18 and are provided on their outer faces with ratchet teeth inthe form of racks 20. A locking mechanism is adapted to cooperate withthese racks for locking the guards 16, 16 after they late beenpositioned by the matrix jaws, said locking mechanism also performingthe additional function of moving the guards 16, 16 with relation toeach other, whereby they are spread as it were, between the matrix jawsand may serve, if so desired, to separate jaws and subsequently toprevent the jaws from again coming into engagement with the matrixmoving devices or heads 12 and 1 1 of the draw rods.

in the preferred embodiment and as illustrated, the carriers 18 are ofannular form, best seen in Figs. 5 and 7 and are adapted for thereception of turntables 0r pawl carriers 21 formed of upper and lowercircular members journaled in the carrier 18 and provided with internalpawls 22 adapted under certain circumstances to cooperate with the racks20. The pawls 22 are normally held out of engagement with the racks 20by movement of the turntable 21 in a reverse direction, as illustrated,for example, in Figs. 5 and 6, wherein it will be seen that shoulders 23on the pawls are in engagement with pawl release projections 2 1 on theturntable itself, and although said pawls are spring-pressed toward eachother, by a cross spring 25 cooperating with pins 26 projecting throughenlarged apertures 27 in the turntable, they cannot come into engagementwith the racks until the turntable is turned in a direction indicated bythe arrow and the word On in Fig. 5. When the turntable is moved in thedirection of the arrow marked On, the pawls will engage the racks andduring the continued movement of the turntable the racks and slides 17,17 will. be moved longitudinally in opposite directions, therebyspreading the two-part head 16, 16 between the matrix jaws. hen thepawls are out of engagement with the racks on the slides, the slides andprojections 16, 16 left free for movement under the control of thematrix jaws themselves, the said projections 16, 16 will be collapsed,by the closing of the jaws, and the whole guard will be adjusted inunison with the adjustment of the matrix.

To perform the function of locking the guards and spreading the ends ofthe guards between the matrix jaws, the turntables are Pl'OVl'ciQd. witha motor mechanism which is under the control of a cam on the cam shaftof the machine. The motor mechanism is preferably a pneumaticallyoperated mechanism, and the function of the cam is to admit pressure andpermit of the exhaust of pressure from one side or the other of themotor piston in accordance with the proper timing of the machine, sothat the guards will be spread and locked when the matrix reaches itsposition of adjustment by the matrix jaws.

The motor mechanism for each guard preferably embodies. a simplecylinder,- that for the front guard being indicated at 28 and that forthe rear guard being inclicated at 29. One of the cylinders isillustrated in section in Fig. 4, from which figure it will be seen thatthe cylinder is provided with a double-acting piston 30 and with anadjustable stop 31 for limiting the movement of the piston in onedirection. Each piston rod 32 is connected through an adjustable linkconnection 33 with turntable 21 and the two cylinders are provided withports and passages in communication with pipes 34 and 35 leading to thefront and rear ends of the cylinders respectively. The pipes 34 and 35lead to a distributing valve mechanism located at the side of themachine in proximity to the cam shaft and preferably mounted on orformed as a part of the bracket 36 which is connected with the machineframe. The distributing valve embodies a casing 37 in which is avertically moving cylindrical valve 38 adapted to be moved upwardly by apush rod 39 bearing on an adjustable support 40 carried by a swingingarm 41 pivoted at 42 and having its lower end forked for the receptionof an antifriction roller 43. The roller 43 bears on the periphery ofcam 44 mounted on the cam shaft 45.

Upward movement of the valve 38 serves to admit pressure to the rearends of the motor cylinders, thereby advancing the pistons and causingthe engagement of the pawls with the guard slides, such upward movementof the valve also permitting pressure to exhaust from the forward endsof the cylinders. Downward movement of the valve reverses the.conditions and permits the pressure to exhaust from the rear ends of thecylinders and admits pressure to the forward ends of the cylinders. Toaccomplish these results the arrangement 'of valve ports and passagesillustrated in Figs. 8, 9 and 10, is preferably employed, that is tosay, pressure from any suitable source is admitted to the upper end ofthe valve casing through a. supply pipe 46 and normally tends to holdthe valve 38 down. The valve is provided with a central bore at theupper end indicated at 47 and from this bore lateral openings lead intoan annular passage 48 which is adapted to register, when the valve iselevated, with the passages 49, in communication with the pipes 35, andwhen the valve is in its lowered position, the said annular passage 48communicates with passages 50 in communication with the pipes 34. Thelower end of the valve 38 is also provided with a central boreconveniently serving both as the exhaust opening and as a seat for thepush rod 39, Said bore is in communication with an annular passage 51,which, when the valve is in elevated position, is in communication witha lower extension of the passages 50, and when the valve is in itslowered position, it is in conimunication with a lower extension of thepassages 49, whereby, when the valve is elevated, the pistons in themotor cylinders will be advanced and when the valve is lowered thepistons in the motor cylinders will be retracted, such movements takingplace with extreme rapidity. By the proper timing of the cam they can bemade'tc take place instantly when the matrix has been positioned overthe mold by the matrix jaws and the centering pin has begun to centerthe matrix socket. The spreading of the guards may exert a pressuretending to open the matrix jaws and said guards will be locked inposition until such time as that the parts shall be freed, for thesubsequent setting operation of the matrix. The dwell of. the cam isproportioned to give this result, and the matrix will be effectuallyguarded against any possible disturbance by reason of the continuedmovement of the matrix jaws or any false movements of said jaws, such asmight be occasioned by vibration.

What is claimed is:

1. A casting machine embodying the following instrumentalities, to wit:a mold, a matrix, means for positioning the matrix with relation to themold, and means for temporarily preventing the accidental reengagementof the positioning mechanism with the matrix after the latter has beenpositioned.

2. A casting machine embodying the following instrumentalities, to wit:a mold, a matrix, means for positioning the matrixwith relation to themold, a movable guard positioned in uniso-n'with the matrix, and meansfor holding the guard in position to temporarily prevent the accidentalregagement of the positioning mechanism with the matrix after the latterhas been positioned.

3. A casting machine embodying the following instrumentalitiesto Wit: amold, a matrix, means for positioning the matrix with relation to themold, operating mecha-' nism therefor, operating connectionsintermediate the matrix and its positioning mechanism independent of theoperating mechanism for the positioning means.

4:. A casting machine, embodying the following instrumentalities, towit: a mold, a matrix, means for positioning the matrix with relation tothe mold, operating connections, means for separating the operatingconnections between the matrix and its positioning means and for holdingsuch separating means in fixed position to form a guard for preventingthe accidental reengagement of the positioning means with the matrix.

5. A casting machine embodying the following instrumentalities, to wit:A mold, a matrix case, means for moving the matrix case to position thematrices with relation to the mold, embodying oppositely movable jaws,means independent or the positioning mechanism for opening the jawsafter the case is positioned, and for temporarily preventing thereengagement of the jaws with the matrix case.

6. A casting machine embodying the following instrumentalities, to wit:a mold, a matrix case, jaws movable toward and from each other toposition the matrix case, a movable guard interposed between the jawsand positioned thereby, and means for operating the guard to separatethe jaws and for holding the guard in fixed position to temporarilyprevent the reengagement of the jaws with the matrix case.

7.. In a type casting machine, the combination with means forpositioning a matrix with relation to the mold, embodying oppositelymovable jaws and operating means for closing and opening the jaws, ofmeans independent of the jaw operating means for temporarily preventingthe closing of the jaws after a matrix has been positioned thereby.

8. In a type casting machine, the combination with means for positioninga matrix with relation to the mold, embodying oppositely movable jaws,operating means for closing and opening the jaws, and an adjustable stopfor determining the point at which the jaws will close, of a guardpositioned by the jaws, and means for locking the guard temporarily inits adjusted position independently of the jaws and matrix, said guardbeing adapted to form an abutment to temporarily prevent the advance ofthe jaws into matrix engaging position.

9. In a type casting machine, the combination with the oppositelymovable matrix jaws, matrix carrier positioned by said aws, and signalcontrolled means for determining the point at which the jaws shallclose, of a guard positioned by the jaws in unison with the matrix, andmeans for temporarily locking said guard in adjusted position to preventthe jaws from moving the matrix prior to the subsequent signalcontrolled movement of the jaws.

10. In a type casting machine, the combination with the oppositelymovable matrix jaws, matrix carrier positioned by the jaws, and signalcontrolled stop for determining the closing position of the jaws, of aguard positioned by the jaws in unison with the matrix, and motormechanism cooperating with the guard to lock the same in position totemporarily prevent forward movement of the jaws from disturbing theposition or" the matrix.

11. In a type casting machine, the com bination with the oppositelymovable matrix jaws, matrix carri r positioned by the jaws, and signalcontrolled stops for determining the closing POSlJlOH of the jaws, of atwo-part guard positioned by the jaws in unison with the matrix, andmotor mechanism cooperating with the guard to spread the same betweenthe jaws and to temporarily lock the same in fixed position forpreventing the reengagement of the jaws with the matrix, prior to thesucceeding signal controlled movement.

12. In a type casting machine, the combination with the oppositelymovable matrix jaws, matrix carrier positioned by the jaws and signalcontrolled stop for determining the closing position of the jaws, of atwo-part guard, positioned by the jaws in unison with the matrix, amotor cylinder and piston, connections intermediate the A iston andguard, whereby the two parts of the guard may be spread and the guardlocked in fixed position, and means for admitting pressure to oppositeends oi the cylinder in timed relation to the movements of the matrixjaws.

13. In a type casting machine, the combination with the matrix casemovable in two directions, pairs of jaws arranged to operate in planessubstantially at right a11- gles to each other and cooperating with thematrix case for positioning the same, signal controlled stops fordetermining the closing position of the jaws, and means for operatingthe jaws of both pairs in unison, of guards positioned between each pairof jaws in unison with the matrix case, locking mechanism for holdingsaid guards temporarily in their set position, and means forsimultaneously operating the locking mechanism of both guards.

14. In a type casting machine, the combination with the oppositelymovable matrix jaws, matrix case positioned by the jaws, and signalcontrolled stop for determining the closing position of the jaws, of atwo part guard positioned by the jaws in unison with the matrix case,slides on which said guards are mounted, a fixed guide for the slide, aturntable, pawls mounted on said turntable and cooperating with theslides to advance the latter in opposite directions and spread thetwo-part guard between the jaws, and means for operating said turntablein timed relation to the closing movements of the jaws.

15. In a type casting machine, the combination with the oppositelymovable matrix jaws, matrix casepositioned by the jaws and signalcontrolled stops for determining the closing position of the jaws, of atwo-part guard positioned by the jaws in unison with the matrix, slideson which the two-part guard is mounted, said slides embodying oppositelyfacing rack bars, a fixed guide ,for the slides, a turntable, pawlsmounted on said turntable in position to cooperate with the rack barsfor moving the slides in opposite directions. to spread the guard,shoulders on the turntable, normally holding the pawls out of engagementwith the rack bars, and means for moving the turntable in timed relationto the elosing of the matrix jaws.

JOHN SELLERS BANGROFT. MAURITZ C. INDAHL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

